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ipu_ic.c

/*
 * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

/*
 * @file ipu_ic.c
 *
 * @brief IPU IC functions
 *
 * @ingroup IPU
 */
#include <linux/types.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/ipu.h>

#include "ipu_prv.h"
#include "ipu_regs.h"
#include "ipu_param_mem.h"

enum {
      IC_TASK_VIEWFINDER,
      IC_TASK_ENCODER,
      IC_TASK_POST_PROCESSOR
};

extern int g_ipu_hw_rev;
static void _init_csc(uint8_t ic_task, ipu_color_space_t in_format,
                  ipu_color_space_t out_format);
static bool _calc_resize_coeffs(uint32_t inSize, uint32_t outSize,
                        uint32_t * resizeCoeff,
                        uint32_t * downsizeCoeff);

void _ipu_ic_enable_task(ipu_channel_t channel)
{
      uint32_t ic_conf;

      ic_conf = __raw_readl(IC_CONF);
      switch (channel) {
      case CSI_PRP_VF_ADC:
      case MEM_PRP_VF_ADC:
      case CSI_PRP_VF_MEM:
      case MEM_PRP_VF_MEM:
            ic_conf |= IC_CONF_PRPVF_EN;
            break;
      case MEM_ROT_VF_MEM:
            ic_conf |= IC_CONF_PRPVF_ROT_EN;
            break;
      case CSI_PRP_ENC_MEM:
      case MEM_PRP_ENC_MEM:
            ic_conf |= IC_CONF_PRPENC_EN;
            break;
      case MEM_ROT_ENC_MEM:
            ic_conf |= IC_CONF_PRPENC_ROT_EN;
            break;
      case MEM_PP_ADC:
      case MEM_PP_MEM:
            ic_conf |= IC_CONF_PP_EN;
            break;
      case MEM_ROT_PP_MEM:
            ic_conf |= IC_CONF_PP_ROT_EN;
            break;
      case CSI_MEM:
            // ???
            ic_conf |= IC_CONF_RWS_EN | IC_CONF_PRPENC_EN;
            break;
      default:
            break;
      }
      __raw_writel(ic_conf, IC_CONF);
}

void _ipu_ic_disable_task(ipu_channel_t channel)
{
      uint32_t ic_conf;

      ic_conf = __raw_readl(IC_CONF);
      switch (channel) {
      case CSI_PRP_VF_ADC:
      case MEM_PRP_VF_ADC:
      case CSI_PRP_VF_MEM:
      case MEM_PRP_VF_MEM:
            ic_conf &= ~IC_CONF_PRPVF_EN;
            break;
      case MEM_ROT_VF_MEM:
            ic_conf &= ~IC_CONF_PRPVF_ROT_EN;
            break;
      case CSI_PRP_ENC_MEM:
      case MEM_PRP_ENC_MEM:
            ic_conf &= ~IC_CONF_PRPENC_EN;
            break;
      case MEM_ROT_ENC_MEM:
            ic_conf &= ~IC_CONF_PRPENC_ROT_EN;
            break;
      case MEM_PP_ADC:
      case MEM_PP_MEM:
            ic_conf &= ~IC_CONF_PP_EN;
            break;
      case MEM_ROT_PP_MEM:
            ic_conf &= ~IC_CONF_PP_ROT_EN;
            break;
      case CSI_MEM:
            // ???
            ic_conf &= ~(IC_CONF_RWS_EN | IC_CONF_PRPENC_EN);
            break;
      default:
            break;
      }
      __raw_writel(ic_conf, IC_CONF);
}

void _ipu_ic_init_prpvf(ipu_channel_params_t * params, bool src_is_csi)
{
      uint32_t reg, ic_conf;
      uint32_t downsizeCoeff, resizeCoeff;
      ipu_color_space_t in_fmt, out_fmt;

      /* Setup vertical resizing */
      _calc_resize_coeffs(params->mem_prp_vf_mem.in_height,
                      params->mem_prp_vf_mem.out_height,
                      &resizeCoeff, &downsizeCoeff);
      reg = (downsizeCoeff << 30) | (resizeCoeff << 16);

      /* Setup horizontal resizing */
      _calc_resize_coeffs(params->mem_prp_vf_mem.in_width,
                      params->mem_prp_vf_mem.out_width,
                      &resizeCoeff, &downsizeCoeff);
      reg |= (downsizeCoeff << 14) | resizeCoeff;

      __raw_writel(reg, IC_PRP_VF_RSC);

      ic_conf = __raw_readl(IC_CONF);

      /* Setup color space conversion */
      in_fmt = format_to_colorspace(params->mem_prp_vf_mem.in_pixel_fmt);
      out_fmt = format_to_colorspace(params->mem_prp_vf_mem.out_pixel_fmt);
      if (in_fmt == RGB) {
            if ((out_fmt == YCbCr) || (out_fmt == YUV)) {
                  _init_csc(IC_TASK_VIEWFINDER, RGB, out_fmt);
                  ic_conf |= IC_CONF_PRPVF_CSC1;      /* Enable RGB->YCBCR CSC */
            }
      }
      if ((in_fmt == YCbCr) || (in_fmt == YUV)) {
            if (out_fmt == RGB) {
                  _init_csc(IC_TASK_VIEWFINDER, YCbCr, RGB);
                  ic_conf |= IC_CONF_PRPVF_CSC1;      /* Enable YCBCR->RGB CSC */
            } else {
                  /* TODO: Support YUV<->YCbCr conversion? */
            }
      }

      if (params->mem_prp_vf_mem.graphics_combine_en) {
            ic_conf |= IC_CONF_PRPVF_CMB;

            /* need transparent CSC1 conversion */
            _init_csc(IC_TASK_POST_PROCESSOR, RGB, RGB);
            ic_conf |= IC_CONF_PRPVF_CSC1;      /* Enable RGB->RGB CSC */

            if (params->mem_prp_vf_mem.global_alpha_en) {
                  ic_conf |= IC_CONF_IC_GLB_LOC_A;
            } else {
                  ic_conf &= ~IC_CONF_IC_GLB_LOC_A;
            }

            if (params->mem_prp_vf_mem.key_color_en) {
                  ic_conf |= IC_CONF_KEY_COLOR_EN;
            } else {
                  ic_conf &= ~IC_CONF_KEY_COLOR_EN;
            }
      } else {
            ic_conf &= ~IC_CONF_PP_CMB;
      }

#ifndef CONFIG_VIRTIO_SUPPORT /* Setting RWS_EN doesn't work in Virtio */
      if (src_is_csi) {
            ic_conf &= ~IC_CONF_RWS_EN;
      } else {
            ic_conf |= IC_CONF_RWS_EN;
      }
#endif
      __raw_writel(ic_conf, IC_CONF);
}

void _ipu_ic_uninit_prpvf(void)
{
      uint32_t reg;

      reg = __raw_readl(IC_CONF);
      reg &= ~(IC_CONF_PRPVF_EN | IC_CONF_PRPVF_CMB |
             IC_CONF_PRPVF_CSC2 | IC_CONF_PRPVF_CSC1);
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_rotate_vf(ipu_channel_params_t * params)
{
}

void _ipu_ic_uninit_rotate_vf(void)
{
      uint32_t reg;
      reg = __raw_readl(IC_CONF);
      reg &= ~IC_CONF_PRPVF_ROT_EN;
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_csi(ipu_channel_params_t * params)
{
      uint32_t reg;
      reg = __raw_readl(IC_CONF);
      reg &= ~IC_CONF_CSI_MEM_WR_EN;
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_uninit_csi(void)
{
      uint32_t reg;
      reg = __raw_readl(IC_CONF);
      reg &= ~(IC_CONF_RWS_EN | IC_CONF_PRPENC_EN);
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_prpenc(ipu_channel_params_t * params, bool src_is_csi)
{
      uint32_t reg, ic_conf;
      uint32_t downsizeCoeff, resizeCoeff;
      ipu_color_space_t in_fmt, out_fmt;

      /* Setup vertical resizing */
      _calc_resize_coeffs(params->mem_prp_enc_mem.in_height,
                      params->mem_prp_enc_mem.out_height,
                      &resizeCoeff, &downsizeCoeff);
      reg = (downsizeCoeff << 30) | (resizeCoeff << 16);

      /* Setup horizontal resizing */
      _calc_resize_coeffs(params->mem_prp_enc_mem.in_width,
                      params->mem_prp_enc_mem.out_width,
                      &resizeCoeff, &downsizeCoeff);
      reg |= (downsizeCoeff << 14) | resizeCoeff;

      __raw_writel(reg, IC_PRP_ENC_RSC);

      ic_conf = __raw_readl(IC_CONF);

      /* Setup color space conversion */
      in_fmt = format_to_colorspace(params->mem_prp_enc_mem.in_pixel_fmt);
      out_fmt = format_to_colorspace(params->mem_prp_enc_mem.out_pixel_fmt);
      if (in_fmt == RGB) {
            if ((out_fmt == YCbCr) || (out_fmt == YUV)) {
                  /* TODO: ERROR! */
            }
      }
      if ((in_fmt == YCbCr) || (in_fmt == YUV)) {
            if (out_fmt == RGB) {
                  _init_csc(IC_TASK_ENCODER, YCbCr, RGB);
                  ic_conf |= IC_CONF_PRPENC_CSC1;     /* Enable YCBCR->RGB CSC */
            } else {
                  /* TODO: Support YUV<->YCbCr conversion? */
            }
      }

      if (src_is_csi) {
            ic_conf &= ~IC_CONF_RWS_EN;
      } else {
            ic_conf |= IC_CONF_RWS_EN;
      }

      __raw_writel(ic_conf, IC_CONF);
}

void _ipu_ic_uninit_prpenc(void)
{
      uint32_t reg;

      reg = __raw_readl(IC_CONF);
      reg &= ~(IC_CONF_PRPENC_EN | IC_CONF_PRPENC_CSC1);
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_rotate_enc(ipu_channel_params_t * params)
{
}

void _ipu_ic_uninit_rotate_enc(void)
{
      uint32_t reg;

      reg = __raw_readl(IC_CONF);
      reg &= ~(IC_CONF_PRPENC_ROT_EN);
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_pp(ipu_channel_params_t * params)
{
      uint32_t reg, ic_conf;
      uint32_t downsizeCoeff, resizeCoeff;
      ipu_color_space_t in_fmt, out_fmt;

      /* Setup vertical resizing */
      _calc_resize_coeffs(params->mem_pp_mem.in_height,
                      params->mem_pp_mem.out_height,
                      &resizeCoeff, &downsizeCoeff);
      reg = (downsizeCoeff << 30) | (resizeCoeff << 16);

      /* Setup horizontal resizing */
      _calc_resize_coeffs(params->mem_pp_mem.in_width,
                      params->mem_pp_mem.out_width,
                      &resizeCoeff, &downsizeCoeff);
      reg |= (downsizeCoeff << 14) | resizeCoeff;

      __raw_writel(reg, IC_PP_RSC);

      ic_conf = __raw_readl(IC_CONF);

      /* Setup color space conversion */
      in_fmt = format_to_colorspace(params->mem_pp_mem.in_pixel_fmt);
      out_fmt = format_to_colorspace(params->mem_pp_mem.out_pixel_fmt);
      if (in_fmt == RGB) {
            if ((out_fmt == YCbCr) || (out_fmt == YUV)) {
                  _init_csc(IC_TASK_POST_PROCESSOR, RGB, out_fmt);
                  ic_conf |= IC_CONF_PP_CSC2;   /* Enable RGB->YCBCR CSC */
            }
      }
      if ((in_fmt == YCbCr) || (in_fmt == YUV)) {
            if (out_fmt == RGB) {
                  _init_csc(IC_TASK_POST_PROCESSOR, YCbCr, RGB);
                  ic_conf |= IC_CONF_PP_CSC1;   /* Enable YCBCR->RGB CSC */
            } else {
                  /* TODO: Support YUV<->YCbCr conversion? */
            }
      }

      if (params->mem_pp_mem.graphics_combine_en) {
            ic_conf |= IC_CONF_PP_CMB;

            /* need transparent CSC1 conversion */
            _init_csc(IC_TASK_POST_PROCESSOR, RGB, RGB);
            ic_conf |= IC_CONF_PP_CSC1;   /* Enable RGB->RGB CSC */

            if (params->mem_pp_mem.global_alpha_en) {
                  ic_conf |= IC_CONF_IC_GLB_LOC_A;
            } else {
                  ic_conf &= ~IC_CONF_IC_GLB_LOC_A;
            }

            if (params->mem_pp_mem.key_color_en) {
                  ic_conf |= IC_CONF_KEY_COLOR_EN;
            } else {
                  ic_conf &= ~IC_CONF_KEY_COLOR_EN;
            }
      } else {
            ic_conf &= ~IC_CONF_PP_CMB;
      }

      __raw_writel(ic_conf, IC_CONF);
}

void _ipu_ic_uninit_pp(void)
{
      uint32_t reg;

      reg = __raw_readl(IC_CONF);
      reg &= ~(IC_CONF_PP_EN | IC_CONF_PP_CSC1 | IC_CONF_PP_CSC2 |
             IC_CONF_PP_CMB);
      __raw_writel(reg, IC_CONF);
}

void _ipu_ic_init_rotate_pp(ipu_channel_params_t * params)
{
}

void _ipu_ic_uninit_rotate_pp(void)
{
      uint32_t reg;
      reg = __raw_readl(IC_CONF);
      reg &= ~IC_CONF_PP_ROT_EN;
      __raw_writel(reg, IC_CONF);
}

static void _init_csc(uint8_t ic_task, ipu_color_space_t in_format,
                  ipu_color_space_t out_format)
{
/*     Y = R *  .299 + G *  .587 + B *  .114;
       U = R * -.169 + G * -.332 + B *  .500 + 128.;
       V = R *  .500 + G * -.419 + B * -.0813 + 128.;*/
      static const uint32_t rgb2ycbcr_coeff[4][3] = {
            {0x004D, 0x0096, 0x001D},
            {0x01D5, 0x01AB, 0x0080},
            {0x0080, 0x0195, 0x01EB},
            {0x0000, 0x0200, 0x0200},     /* A0, A1, A2 */
      };

      /* transparent RGB->RGB matrix for combining
       */
      static const uint32_t rgb2rgb_coeff[4][3] = {
            {0x0080, 0x0000, 0x0000},
            {0x0000, 0x0080, 0x0000},
            {0x0000, 0x0000, 0x0080},
            {0x0000, 0x0000, 0x0000},     /* A0, A1, A2 */
      };

/*     R = (1.164 * (Y - 16)) + (1.596 * (Cr - 128));
       G = (1.164 * (Y - 16)) - (0.392 * (Cb - 128)) - (0.813 * (Cr - 128));
       B = (1.164 * (Y - 16)) + (2.017 * (Cb - 128); */
      static const uint32_t ycbcr2rgb_coeff[4][3] = {
            {149, 0, 204},
            {149, 462, 408},
            {149, 255, 0},
            {8192 - 446, 266, 8192 - 554},      /* A0, A1, A2 */
      };

      uint32_t param[2];
      uint32_t address = 0;

      if (g_ipu_hw_rev > 1) {
            if (ic_task == IC_TASK_VIEWFINDER) {
                  address = 0x645 << 3;
            } else if (ic_task == IC_TASK_ENCODER) {
                  address = 0x321 << 3;
            } else if (ic_task == IC_TASK_POST_PROCESSOR) {
                  address = 0x96C << 3;
            } else {
                  BUG();
            }
      } else {
            if (ic_task == IC_TASK_VIEWFINDER) {
                  address = 0x5a5 << 3;
            } else if (ic_task == IC_TASK_ENCODER) {
                  address = 0x2d1 << 3;
            } else if (ic_task == IC_TASK_POST_PROCESSOR) {
                  address = 0x87c << 3;
            } else {
                  BUG();
            }
      }

      if ((in_format == YCbCr) && (out_format == RGB)) {
            /* Init CSC1 (YCbCr->RGB) */
            param[0] =
                (ycbcr2rgb_coeff[3][0] << 27) | (ycbcr2rgb_coeff[0][0] <<
                                         18) |
                (ycbcr2rgb_coeff[1][1] << 9) | ycbcr2rgb_coeff[2][2];
            /* scale = 2, sat = 0 */
            param[1] = (ycbcr2rgb_coeff[3][0] >> 5) | (2L << (40 - 32));
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (ycbcr2rgb_coeff[3][1] << 27) | (ycbcr2rgb_coeff[0][1] <<
                                         18) |
                (ycbcr2rgb_coeff[1][0] << 9) | ycbcr2rgb_coeff[2][0];
            param[1] = (ycbcr2rgb_coeff[3][1] >> 5);
            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (ycbcr2rgb_coeff[3][2] << 27) | (ycbcr2rgb_coeff[0][2] <<
                                         18) |
                (ycbcr2rgb_coeff[1][2] << 9) | ycbcr2rgb_coeff[2][1];
            param[1] = (ycbcr2rgb_coeff[3][2] >> 5);
            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);
      } else if ((in_format == RGB) && (out_format == YCbCr)) {
            /* Init CSC1 (RGB->YCbCr) */
            param[0] =
                (rgb2ycbcr_coeff[3][0] << 27) | (rgb2ycbcr_coeff[0][0] <<
                                         18) |
                (rgb2ycbcr_coeff[1][1] << 9) | rgb2ycbcr_coeff[2][2];
            /* scale = 1, sat = 0 */
            param[1] = (rgb2ycbcr_coeff[3][0] >> 5) | (1UL << 8);
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (rgb2ycbcr_coeff[3][1] << 27) | (rgb2ycbcr_coeff[0][1] <<
                                         18) |
                (rgb2ycbcr_coeff[1][0] << 9) | rgb2ycbcr_coeff[2][0];
            param[1] = (rgb2ycbcr_coeff[3][1] >> 5);
            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (rgb2ycbcr_coeff[3][2] << 27) | (rgb2ycbcr_coeff[0][2] <<
                                         18) |
                (rgb2ycbcr_coeff[1][2] << 9) | rgb2ycbcr_coeff[2][1];
            param[1] = (rgb2ycbcr_coeff[3][2] >> 5);
            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);
            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);
      } else if ((in_format == RGB) && (out_format == RGB)) {
            /* Init CSC1 */
            param[0] =
                (rgb2rgb_coeff[3][0] << 27) | (rgb2rgb_coeff[0][0] << 18) |
                (rgb2rgb_coeff[1][1] << 9) | rgb2rgb_coeff[2][2];
            /* scale = 2, sat = 0 */
            param[1] = (rgb2rgb_coeff[3][0] >> 5) | (2UL << 8);

            _ipu_write_param_mem(address, param, 2);

            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (rgb2rgb_coeff[3][1] << 27) | (rgb2rgb_coeff[0][1] << 18) |
                (rgb2rgb_coeff[1][0] << 9) | rgb2rgb_coeff[2][0];
            param[1] = (rgb2rgb_coeff[3][1] >> 5);

            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);

            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);

            param[0] =
                (rgb2rgb_coeff[3][2] << 27) | (rgb2rgb_coeff[0][2] << 18) |
                (rgb2rgb_coeff[1][2] << 9) | rgb2rgb_coeff[2][1];
            param[1] = (rgb2rgb_coeff[3][2] >> 5);

            address += 1L << 3;
            _ipu_write_param_mem(address, param, 2);

            dev_dbg(g_ipu_dev,
                  "addr 0x%04X: word0 = 0x%08X, word1 = 0x%08X\n",
                  address, param[0], param[1]);
      } else {
            dev_err(g_ipu_dev, "Unsupported color space conversion\n");
      }
}

static bool _calc_resize_coeffs(uint32_t inSize, uint32_t outSize,
                        uint32_t * resizeCoeff,
                        uint32_t * downsizeCoeff)
{
      uint32_t tempSize;
      uint32_t tempDownsize;

      /* Cannot downsize more than 8:1 */
      if ((outSize << 3) < inSize) {
            return false;
      }
      /* compute downsizing coefficient */
      tempDownsize = 0;
      tempSize = inSize;
      while ((tempSize >= outSize * 2) && (tempDownsize < 2)) {
            tempSize >>= 1;
            tempDownsize++;
      }
      *downsizeCoeff = tempDownsize;

      /* compute resizing coefficient using the following equation:
         resizeCoeff = M*(SI -1)/(SO - 1)
         where M = 2^13, SI - input size, SO - output size    */
      *resizeCoeff = (8192L * (tempSize - 1)) / (outSize - 1);
      if (*resizeCoeff >= 16384L) {
            dev_err(g_ipu_dev, "Warning! Overflow on resize coeff.\n");
            *resizeCoeff = 0x3FFF;
      }

      dev_dbg(g_ipu_dev, "resizing from %u -> %u pixels, "
            "downsize=%u, resize=%u.%lu (reg=%u)\n", inSize, outSize,
            *downsizeCoeff, (*resizeCoeff >= 8192L) ? 1 : 0,
            ((*resizeCoeff & 0x1FFF) * 10000L) / 8192L, *resizeCoeff);

      return true;
}

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